Real Estate Investments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Schedule of Investments [Line Items]
Land	$ 17,297		$ 18,892
Building and improvements	56,157		59,256
Intangibles	329		329
Subtotal	73,783		78,477
Less accumulated depreciation and amortization	10,410		10,658
Total	63,373		67,819
Gain on sale of real estate investment	$ 0	$ 1,063
Minimum [Member]
Schedule of Investments [Line Items]
Estimated useful life	5 years
Maximum [Member]
Schedule of Investments [Line Items]
Estimated useful life	39 years